#
# Copyright 2024 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

@Engine("duckdb");

@Recursive(N, ∞, stop: S);
N() = 0 :- ~N();
N() = N() + 1;

S("yes") :- N() > 10;

Test(!~ (N() > 10), !~ (N() < 20), Array{n -> n :- n = N()});